Orthodontia appliance.



O. F. MONTAG. ORTHODONTIA APPLIANCE. APPLICATION FILED MAY 6, 1912.

1,085,466, Patented Jan. 27, 1914.

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CHRISTOIH FRIEDRICH MONTAG, F BLUE ISLAND, ILLINOIS.

ORTHODONTIA APPLIANCE.

Specification of Letters Patent.

Patented Jan. 2'7, 1914.

Application filed May 6, 1912. Serial No. 695,359.

To all whom it may concern:

Be it known that I, CHRISTOPH FRIEDRICH I MONTAG, a citizen of the United States, re-

siding at Blue Island, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Orthodontia Appliances, of which the following is a specification.

My invention relates to certain new and useful improvements in orthodontia appliances, and is fully described and explained in the specification and shown in the accompanying drawings, in which Figure 1 is an elevation showing my improved device applied to the teeth in its operative position; Fig. 2 is a horizontal section through the anchor-band and buccaltube; Fig. 3 is a section on the line 3 of Fig. 2; Fig. 4 is a perspective of one end of the arch; Fig. 5 is an elevation of a modified form of construction; Fig. 6 is a section on the line 6 therethrough, and Fig. 7 is a perspective view of the end of the arch in the modified form of construction.

In the past it has been understood that serious and improper movements of the anchor teeth are likely to occur in the use of orthodontia appliances of the general type herein illustrated and of other types, due to the tendency of the band with its attached buccal-tube to swivel on the arch. This permits the crowns of the anchor-teeth to swing outward under strain, the roots however not moving, and such movement of the teeth is relatively easy. In other words with an ordinary appliance of common form it has been quite common for the strain of the arch to turn the crowns of the two anchor-teeth outward, the bands turning on the arch to permit this movement. It has been discovered that if the arch be rendered non-rotatable with reference to the band this rotation, or swinging of the anchor-teeth can be prevented, because the anchor-bands, being non-rotatable on the arch have their planes fixed and therefore the teeth can only move by bodily outward movement in which the roots and crown must move to an equal extent. Such movement is exceedingly diflicult to bring about and the strains upon the anchor-teeth are not suflicient to accomplish it.

Many devices have been suggested from time to time for the purpose of rendering the anchor-bands and arches non-rotatable with respect to each other, but all these devices involve more or less complications which are avoided in the present construction, the

results being here accomplished in the simplest possible manner.

In the drawings, 8 are the anchor-bands which carry the buccal-tubes 9. In the form shown in Figs. 1 to 4, inclusive, the buccaltubes are made square. The arch, indicated by 10, is made of squared wire and threaded at its ends as shown in Fig. 4, the wire fitting the buccal-tubes and being thus rendered non-rotatable. The usual adjusting nuts 11 and 12 are screwed on to the squared wire. The anterior part of the arch is turned down into a round form before the arch is bent up so as to be approximately standard size and shape. In the modified construction of Figs. 5, 6 and 7, the buccal-tube is of oval cross-section and the wire of the arch is of corresponding form threaded at its ends and turned down in its center to smaller size for the same purpose. It will be evident that in both these constructions the arch and anchor-band are absolutely non-rotatable with respect to each other and this result is attained in the most simple and convenient manner. A point of particular importance is that no special appliances or devices other than those commonly used are required, so that no extra parts or unusually fine mechanical operations, either for the manufacturer or the dentist, are required.

I claim as new and desire to secure by Letters Patent:

The combination of an anchor band with an anchor tube, a screw-threaded arch band end entering the same, the two parts each provided with cooperative interengaging faces for preventing their relative rotation and a nut adapted to traverse the said screw thread.

In testimony whereof I have hereunto set my hand.

CHRISTOPH FRIEDRICH MON TAG.

In presence of two subscribing witnesses:

A. C. FISCHER, R. SOHAEFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

